style.css

body, #slider, .wrap, .slide-content{
    margin:0;
    padding: 0;
    width:100%;
    height: 100vh;
    overflow-x: hidden;
}

.wrap{
    position: relative;
}

.slide{
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

}

.slide1{
    background-image: url('images/image1.jpeg');
}

.slide2{
    background-image: url('images/image2.jpeg');
}

.slide3{
    background-image: url('images/image3.jpeg');
}

.slide-content{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}
.slide-content span{
    font-size: 5rem;
    color: #fff;
    
}

.arrow{
    cursor: pointer;
    position: absolute;
    top: 50%;
    margin-top: -35px;
    width: 0;
    height: 0;
    border-style: solid;
}

#arrow-left{
    border-width: 30px 40px 30px 0;
    border-color: transparent #fff transparent transparent;
    left: 0;
    margin-left: 30px;
}

#arrow-right{
    border-width: 30px 0px 30px 40px;
    border-color: transparent  transparent transparent #fff;
    right: 0;
    margin-right: 30px;
}